51315652 has 6 divisors (see below), whose sum is σ = 89802398. Its totient is φ = 25657824.

The previous prime is 51315647. The next prime is 51315653. The reversal of 51315652 is 25651315.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 10150596 = 6416^2 + 3186^2 .

It is a super-2 number, since 2×51315652² = 5266592280370208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51315652.

It is not an unprimeable number, because it can be changed into a prime (51315653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6414453 + ... + 6414460.

Almost surely, 2^51315652 is an apocalyptic number.

It is an amenable number.

51315652 is a deficient number, since it is larger than the sum of its proper divisors (38486746).

51315652 is a wasteful number, since it uses less digits than its factorization.

51315652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12828917 (or 12828915 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 51315652 is about 7163.4943986856. The cubic root of 51315652 is about 371.6064844764.

Adding to 51315652 its reverse (25651315), we get a palindrome (76966967).

The spelling of 51315652 in words is "fifty-one million, three hundred fifteen thousand, six hundred fifty-two".